Glass insulators have been found to have a series of advantages over porcelain insulators during the initial years of production and operation:

Due to the high mechanical strength of the glass insulator's surface, it is less prone to cracking. The electrical strength of glass typically remains constant throughout its operation, and its aging process is much slower than that of porcelain. Therefore, glass insulators are primarily retired due to self-damage, which occurs within the first year of operation, whereas defects in porcelain insulators are only discovered after several years of operation.

Using glass insulators eliminates the need for regular preventive electrical tests during operation, as any damage to the tempered glass will result in the destruction of the insulator, which is easily detectable during routine maintenance. When the insulator is damaged, glass fragments are trapped near the steel cap and iron foot, and the remaining mechanical strength of the insulator is sufficient to prevent the string from breaking. The rate of glass breakage is a crucial quality indicator for product quality and serves as a quality basis for bid evaluation in transmission engineering projects.